28 JAN 2012 by ideonexus

 Electrons Cannot Simultaneously Have Position and Velocity

On careful examination the physicist finds that in the sense in which he uses language no meaning at all can be attached to a physical concept which cannot ultimately be described in terms of some sort of measurement. A body has position only in so far as its position can be measured; if a position cannot in principle be measured, the concept of position applied to the body is meaningless, or in other words, a position of the body does not exist. Hence if both the position and velocity of ele...
  1  notes

If the characteristics cannot be measured, they do not exist; therefore, electrons cannot simultaneously have both position and velocity characteristics.